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Ken Griffin Says Citadel Cut 80% Risk Post-Acquisition

8/21/2026

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Summary

Story summary

Ken Griffin said Citadel removed over 80% of risk from the acquired Situational Awareness portfolio.
Citadel started acquisition talks with Leopold Aschenbrenner’s Situational Awareness hedge fund on July 29.
The next day, Situational Awareness sold all public stock positions after steep losses.
Citadel executed over 100 block trades worth more than $4 billion, thanking banks’ trading and prime-brokerage teams.

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Story summary

Ken Griffin said Citadel removed over 80% of risk from the acquired Situational Awareness portfolio.
Citadel started acquisition talks with Leopold Aschenbrenner’s Situational Awareness hedge fund on July 29.
The next day, Situational Awareness sold all public stock positions after steep losses.
Citadel executed over 100 block trades worth more than $4 billion, thanking banks’ trading and prime-brokerage teams.